AUSTIN, Texas — Westwood High School in Round Rock ISD was placed under a lockdown Wednesday afternoon.

According to Principal Mario Acosta, the lockdown began around 1:35 p.m. as law enforcement addressed an unknown concern. The lockdown was lifted at 2:45 p.m.

All students and staff are safe and secure in the building.

"The safety and security of our students and staff is our top priority," Acosta said.

This story will be updated as more information becomes available.